anonymous
  • anonymous
PLEASSE HELP. I will award medal! I really dont understand this...
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
Do you know the formulas for circumference and area of a circle?
anonymous
  • anonymous
Here's a simplification of the formulas:\[Area = \pi r^{2} = \pi \frac{d^{2}}{2^{2}} = \frac{\pi d^{2}}{4}\]
anonymous
  • anonymous
Oh, and circumference:\[Circumference = \pi r = \pi \frac{d}{2} = \frac{\pi d}{2}\]

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anonymous
  • anonymous
Okay so I do i do that? Plug in 3.14 for tt and 14 for d?
anonymous
  • anonymous
It's not called tt, it's called "pi", and you don't want to actually plug in a value for it. You just leave it represented as pi. Everyone knows the value of pi (3.1415...), so rather than messing with all of the decimal digits, we just say you have x many pi's. Like "I have two pi's" So in this case, you would plug in 14 for d and solve
anonymous
  • anonymous
I got D, am I correct?
anonymous
  • anonymous
@alexray19

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